When the electron in hydrogen atom is excited from the `4^th` stationary orbit to the `5^th` stationary orbit, the chang e in the angular momentum of the electron in `j_-S` IS ( Planck's cpnstant h`=6.64xx10^(-34) J_(-s)`)

Options

A. `4.16xx10^(-34)`
B. `3.32xx10^(-34`
C. `1.05xx10^(-34)`
D. `2.08xx10^(-34)`

Answer

c

Explanation

ACCORDING TO Bohr theory,
Angular momentum of electron `=n(h)/(2pi)`
Change in angular momentum,
`DeltaL=h/(2pi)(n_2-n_1)`
`=(6.6xx10^(-34))/(2xx3.14)(5-4)=1.05xx10^(-34) J-s`